PROBLEM TO BE SOLVED: To provide an improved endoscopic treatment instrument having higher operability.SOLUTION: The endoscopic treatment instrument includes: an insertion portion having a distal end and a proximal end, the distal end being inserted into a human body a treatment portion provided at the distal end and a control portion provided at the proximal end. The treatment portion includes: an extending and retractable input member 100 operated by the control portion a first link 811 disconnectably connected to the input member through a first connecting portion 823 a first forceps member 115 capable of opening and closing by the first link a second link disconnectably connected to the input member through a second connecting portion 833 and a second forceps member 131 capable of freely opening and closing by the second link, the opening-and-closing angle of the second forceps member being smaller than that of the first forceps member.COPYRIGHT: (C)2012,JPO&INPIT【課題】より操作性の向上した内視鏡用処置具を提供する。【解決手段】内視鏡用処置具は、先端と基端とを備え、先端が体内に挿入される挿入部と、先端に設けられた処置部と、基端に設けられた操作部と、を備え、処置部は、操作部の操作によって進退する1つの入力部材100と、入力部材に第一の接続部823を介して切り離し可能に接続される第一のリンク811と、第一のリンクによって開閉動作可能な第一の鉗子部材115と、入力部材に第二の接続部833を介して切り離し可能に接続される第二のリンクと、第二のリンクによって開閉動作可能で、第一の鉗子部材より開閉可能な角度が小さい第二の鉗子部材131と、を備える。【選択図】図63
